Tag Archives: Daewoo Shipbuilding

KSS III class submarine

According to information published by Naval News on August 13, 2021, the ceremony for the handover, acquisition and commissioning of the Republic of Korea Navy’s submarine ROKS Dosan Ahn Changho (SS-083) held at the Okpo shipyard of Daewoo Shipbuilding and Marine Engineering in Geoje, Gyeongsangnam-do Province. The vessel is the nation’s first in the 3,000-ton class designed and built with domestic technology.

ROKS Dosan Ahn Changho (SS-083)
ROK Navy Commissions Her First KSS III Submarine

The Dosan Ahn Changho-class submarines are the final phase of the Korean Attack Submarine program, a three-phased program to build 27 attack submarines for the Republic of Korea Navy between 1994 and 2029. The lead vessel, ROKS Dosan Ahn Changho (SS-083), was launched in 2018. It began sea trials in 2019 and planned to be ready for service by 2020.

The 83.5-meter-long/274-fot-long and 9.6-meter-wide/31.5-foot-wide submarine can carry 50 crewmembers and can operate underwater for 20 days without surfacing.

The new class has a submarine version of the Korean Vertical Launching System which will be able to carry up to ten indigenous «Chonryong» land-attack cruise missiles and «Hyunmoo» Submarine-Launched Ballistic Missiles (SLBM), becoming the first submarine in the South Korean navy to have this kind of capability. It also has many other improvements compared to its predecessors built with a greater degree of South Korean technology, especially in the later batches, which will include Samsung SDI lithium-ion batteries.

A Lithium-Ion Battery (abbreviated as LIB) is a type of rechargeable battery. Lithium-ion batteries are commonly used for portable electronics and electric vehicles and are growing in popularity for military and aerospace applications. Research areas for lithium-ion batteries include extending lifetime, increasing energy density, improving safety, reducing cost, and increasing charging speed, among others. Research has been underway in the area of non-flammable electrolytes as a pathway to increased safety based on the flammability and volatility of the organic solvents used in the typical electrolyte.

Dosan Ahn Chang-Ho

According to Korea Times, South Korea held a launching ceremony Friday for a 3,000-ton indigenous submarine, a new strategic weapons system designed to bolster underwater defense capabilities.

South Korea launches 3,000-Ton homegrown submarine «Dosan Ahn Chang-Ho»
South Korea launches 3,000-Ton homegrown submarine «Dosan Ahn Chang-Ho»

The ceremony for the diesel-electric air-independent propulsion submarine, named after a prominent South Korean independence fighter, Dosan Ahn Chang-ho, took place at the Okpo Shipyard of Daewoo Shipbuilding and Marine Engineering Co. on the southern island of Geoje.

The ceremony was attended by 350 people, including government and military officials and employees of the shipbuilder, the Navy said.

«The Dosan Ahn Chang-ho submarine is the Navy’s first mid-class submarine and has been built with a combination of cutting-edge technologies», the Navy said in a press release. «This is a national strategic weapons system capable of responding to all threats, and it will help strengthen the Navy’s defense capabilities».

While the country’s existing 1,200-ton and 1,800-ton submarines were built with technological assistance from Germany defense firms, the latest submarine has been domestically designed, and 76 percent of its component parts were made by Korean businesses.

The new 83.3-meter-long, 9.6-meter-wide submarine capable of carrying 50 crewmembers is equipped with six vertical launching tubes capable of firing submarine-to-ground ballistic missiles and can operate underwater for 20 days without surfacing, officials explained.

It is set to be delivered to the Navy in December 2020 after tests. Its operational deployment is slated for January 2022. It costs around 1 trillion won per unit.

The construction of the new submarine is part of South Korea’s project to domestically build the 3,000-ton Changbogo-III submarine. The project, worth 3.33 trillion won ($2.97 billion), was launched in 2007 and is set to end in 2023.